Jesus certainly did address human sexuality. Many times!. Mat_19:5 And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?
Mar_10:7 For this cause shall a man leave his father and mother, and cleave to his wife…
Mar_10:6 But from the beginning of the creation God made them male and female.

Saying He specifically never addressed certain topics specifically is a *STRAWMAN*